<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Netty WebSocket 时间服务器</title>
</head>
<body>
<script>
  var socket;
  if (!window.WebSocket) {
    window.WebSocket = window.MozWebSocket;
  }
  if (window.WebSocket) {
    socket = new WebSocket("ws://localhost:8080/websocket");
    socket.onmessage = function (event) {
      var ta = document.getElementById('responseText');
      ta.value = "";
      ta.value = event.data;
    }
    socket.onopen = function (event) {
      var ta = document.getElementById('responseText');
      ta.value = "打开WebSocket服务正常，浏览器支持WebSocket"
    }
    socket.onclose = function (event) {
      var ta = document.getElementById('responseText');
      ta.value = ""
      ta.value = "WebSocket关闭"
    }
  } else {
    alert("抱歉您的浏览器不支持WebSocket协议");
  }
  function send(message) {
    if (!window.WebSocket) {
      return;
    }
    if (socket.readyState == WebSocket.OPEN) {
      socket.send(message)
    } else {
      alert("WebSocket连接没有建立成功");
    }
  }
</script>

<form onsubmit="return false;">
    <input type="text" name="message" value="Netty 最佳实践">
    <br><br>
    <input type="button" value="发送 WebSocket请求消息" onclick="send(this.form.message.value)"/>
    <hr color="blue"/>
    <h3>服务端返回应答消息</h3>
    <textarea id="responseText" style="width: 500px;height: 300px">

        </textarea>
</form>
</body>
</html>
